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From: Dmitry Torokhov <dtor_core@ameritech.net>
To: Greg KH <greg@kroah.com>
Subject: Re: 2.6.14-rc4-mm1
Date: Tue, 18 Oct 2005 02:09:48 -0500
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Cc: Andrew Morton <akpm@osdl.org>, Brice Goglin <Brice.Goglin@ens-lyon.org>,
       linux-kernel@vger.kernel.org, Vojtech Pavlik <vojtech@suse.cz>
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On Tuesday 18 October 2005 01:58, Greg KH wrote:
> On Mon, Oct 17, 2005 at 01:22:42PM -0700, Andrew Morton wrote:
> > Brice Goglin <Brice.Goglin@ens-lyon.org> wrote:
> > > Modules linked in: pcspkr parport_pc parport irtty_sir sir_dev irda
> > > crc_ccitt hw_random uhci_hcd usbcore snd_maestro3 snd_ac97_codec
> > > snd_ac97_bus snd_pcm_oss snd_mixer_oss snd_pcm snd_timer snd_page_alloc
> > > snd soundcore yenta_socket rsrc_nonstatic pcmcia_core nls_iso8859_15
> > > nls_cp850 vfat fat nls_base psmouse
> > > CPU:    0
> > > EIP:    0060:[<c01dda09>]    Not tainted VLI
> > > EFLAGS: 00010246   (2.6.14-rc4-mm1=LoulousMobile)
> > > EIP is at get_kobj_path_length+0x19/0x30
> > > eax: 00000000   ebx: 00000000   ecx: ffffffff   edx: e6efee50
> > > esi: 00000001   edi: 00000000   ebp: e737eec8   esp: e737eebc
> > > ds: 007b   es: 007b   ss: 0068
> > > Process sed (pid: 3258, threadinfo=e737e000 task=e7970a90)
> > > Stack: e6efe800 00000001 e6de4000 e737eee8 c01dda9a e6efee50 e6de42e4
> > > 00000286
> > >        e6efe800 00000001 e6de4000 e737ef24 c02a357f e6efee50 800000d0
> > > 0000000f
> > >        00000002 0000000a 00000000 e6efe800 00000000 000002e5 000002e5
> > > e7e9ce60
> > > Call Trace:
> > >  [<c010414b>] show_stack+0xab/0xf0
> > >  [<c010433f>] show_registers+0x18f/0x230
> > >  [<c0104592>] die+0x102/0x1c0
> > >  [<c035f27a>] do_page_fault+0x33a/0x66f
> > >  [<c0103dbb>] error_code+0x4f/0x54
> > >  [<c01dda9a>] kobject_get_path+0x1a/0x70
> > >  [<c02a357f>] input_devices_read+0x53f/0x590
> > >  [<c01a2e75>] proc_file_read+0x1b5/0x260
> > >  [<c01689f8>] vfs_read+0xa8/0x190
> > >  [<c0168dc7>] sys_read+0x47/0x70
> > >  [<c0103325>] syscall_call+0x7/0xb
> > > Code: f8 89 ec 5d c3 8d b6 00 00 00 00 8d bc 27 00 00 00 00 55 89 e5 8b
> > > 55 08 57 56 be 01 00 00 00 53 31 db 8b 3a b9 ff ff ff ff 89 d8 <f2> ae
> > > f7 d1 49 8b 52 24 8d 74 31 01 85 d2 75 e7 5b 89 f0 5e 5f
> > > <6>input: isa0061/input0//class/input_dev as input3
> > 
> > Something went wrong under input_devices_read().   Probably culprits cc'ed.
> 
> I know this patch doesn't have the proc path, but it does fix an easy
> oops that I can generate from sysfs input devices.  Can you try it out
> to see if it fixes your issue too?
>

I am confused - the only thing changed is the way you create attributes,
not the way data is accessed. What is the difference and why does it fix
the OOPS? 

Thanks!

-- 
Dmitry
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